けい (Kei Nomura)

This plugin will remove comments feed links from header, output only posts feed. When someone tries to access the comments feed url, your server returns status code 404.

mypace Remove Comments Feed Link

This plugin will remove comments feed links from header, output only posts feed.

scribu

This plugin adds feed auto-discovery links to any page type:
<ul>
<li>Category page</li>
<li>Tag page</li>
<li>Search page</li>
<li>Author page</li>
<li>Comments feed for single articles and pages</li>
</ul>
It also has a template tag that you can use in your theme.
Links: <a href="http://scribu.net/wordpress/extra-feed-links" rel="nofollow ugc">Plugin News</a> | <a href="http://scribu.net" rel="nofollow ugc">Author’s Site</a>

Extra Feed Links

Adds extra feed auto-discovery links to various page types (categories, tags, search results etc.)

mypace Remove Comments Feed Link vs Extra Feed Links